Scenario Name: rs7_capacity
Disruption Type:_ Betweeness Centrality
Disruption Steps: 2
Report Date: 2024-04-09

The FTOT Link Removal tool assesses how resilient an optimal solution is to the removal of key links in the network. The tool removes road links from the network one-by-one in order of importance, each time re-solving for the optimal routing solution and the new scenario cost. Link importance is based either on a network property known as betweenness centrality or on the volume of vehicles on roadway links, depending on user selection.

Results for the scenario rs7_capacity are presented below.

Scenario Cost by Disruption Step

The graph below presents total scenario cost (or optimization objective value) versus the disruption step. At each step, another road link is removed. For example, in the first disruption step, the most important road link is removed from the network. In the second disruption step, the second most important link is removed, and so on. The color of the points corresponds to the number of roadway links (edges) remaining in the network after each disruption. Scenario costs will remain the same or increase with each successive disruption but should never decrease.

Maps

The maps below show the optimal road network in the baseline scenario and highlight up to 10 links by importance ranking or by scenario cost.

Symbologize By Rank

The map below plots the optimal route in the baseline scenario and highlights the top ten links by importance. Hover over each highlighted link to see its Net Source OID (link identifier) and rank.

Symbologize By Total Cost

The top ranked links for importance are removed from the network one-by-one in subsequent disruption scenarios. The map below plots the optimal road links in the baseline scenario and highlights each rank removed based on the resulting scenario cost in the associated disruption scenario.

Betweeness Centrality and Background Flows

The scatter plot below shows the relationship between the between centrality and background vehicle flows for links used in the optimal solution of the baseline scenario. Each roadway segment in the optimal solution is represented by a point. This plot appears only for scenarios run with background flows turned on in the FTOT scenario XML file.

Table of Ranked Segments

The table below lists the segment links that were ranked by importance. Links were iteratively removed in subsequent disruption scenario in order of ranking up to the user-specified 2 disruption steps.